1. Jika p = 2/3, q = ¾, r = 5/6 maka hitunglah nilai dari : pr – qr

pr - qr
(2/3 × 5/6) - (3/4 × 5/6)
10/18 - 15/24
5/9 - 5/8
-5/72 = -0.06

#pr
2/3 × 5/6 = 10/18 = 5/9

#qr
3/4 × 5/6 = 15/24 = 5/8

jadi pr-qr = 5/9 - 5/8 = 40-45/72 = - 5/72